AcknowledgingConsumerAwareMessageListener (Spring Kafka 2.7.0-RC1 API)

Type Parameters:

K - the key type.

V - the value type.

All Superinterfaces:

GenericMessageListener<org.apache.kafka.clients.consumer.ConsumerRecord<K,V>>, MessageListener<K,V>

All Known Implementing Classes:

FilteringMessageListenerAdapter, KafkaBackoffAwareMessageListenerAdapter, RecordMessagingMessageListenerAdapter, RetryingMessageListenerAdapter

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface AcknowledgingConsumerAwareMessageListener<K,V>
extends MessageListener<K,V>
```
Listener for handling incoming Kafka messages, propagating an acknowledgment handle that recipients can invoke when the message has been processed. Access to the Consumer is provided.

Since:

2.0

Author:

Gary Russell

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default void`	`onMessage(org.apache.kafka.clients.consumer.ConsumerRecord<K,V> data)`	Invoked with data from kafka.
`void`	`onMessage(org.apache.kafka.clients.consumer.ConsumerRecord<K,V> data, Acknowledgment acknowledgment, org.apache.kafka.clients.consumer.Consumer<?,?> consumer)`	Invoked with data from kafka and provides access to the `Consumer`.

Methods inherited from interface org.springframework.kafka.listener.GenericMessageListener
onMessage, onMessage

- Method Detail
  - onMessage
```
default void onMessage(org.apache.kafka.clients.consumer.ConsumerRecord<K,V> data)
```
    Invoked with data from kafka. Containers should never call this since it they will detect that we are a consumer aware acknowledging listener.
    
    Specified by:
    
    onMessage in interface GenericMessageListener<K>
    
    Parameters:
    
    data - the data to be processed.
  - onMessage
```
void onMessage(org.apache.kafka.clients.consumer.ConsumerRecord<K,V> data,
               @Nullable
               Acknowledgment acknowledgment,
               org.apache.kafka.clients.consumer.Consumer<?,?> consumer)
```
    Description copied from interface: GenericMessageListener
    
    Invoked with data from kafka and provides access to the Consumer. The default implementation throws UnsupportedOperationException.
    
    Specified by:
    
    onMessage in interface GenericMessageListener<K>
    
    Parameters:
    
    data - the data to be processed.
    
    acknowledgment - the acknowledgment.
    
    consumer - the consumer.